Laubacii



. I w. H. LAUBACH. MAGHINE- FOR GRINDING OUTTBRS OP'MOWING MACHINES, &o.

No. 74,701. Patented Feb. 18, was.

o with any desired force. A- groove, 8, runs across the bed-plate in the path of the stone, so as to enable the latter, in its transit, to run clear of everything but the cutter o. A scale, it, of equal distance, is inscribed upon" the surface of the bed-plate on the outer side of the slot on.

Operation.

The cutter-bar having been applied to one ofthe sides at by means of the slot pa and set-screw 1n, the bedplate is adjusted in the proper position for giving the required angle to the teeth o,'and, by means of the setscrew 7:, slot It, and set-screw c, the stone is so placed as to impart the desired bevel to the edges of said teeth, when the cutter o. is clamped between the bed-plate and bar r, and the stone set in rotary motion by means of "the running-gear e It It, driven by' hand, from the crank-pin e, and in longitudinal motion by means of handpressure applied to the arm 02 to which a suitable handle is to be aiiixed, thcsharftb having, as before explained, a motion in the direction of its length for this purpose. The stone 2' is thus made to travel along the edge of the tooth cutting as it goes, always at the same angle, as long as the position of the cutter o is unchanged, and always at the same bevel as long as the position of the post d is unchanged. One side of one tooth having been ground, the shaft 6 is'slid back to its first position, the cutter passed further under the clamp so as to bring-thc same side of the next tooth into place, and the operation is repeated, When the same sides of all the teeth have bCiI ground, the cutter is turned end for end, and placed against the opposite side a. By means of the scale t the bed-plate may be set so thatthe other sides of the teeth may be ground at the same angle as the former sides.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, .is

1. The adjustable bed-piece B, constructed as described, and applied to a grinding-machine as and for the purpose specified.

2; The bed-piece B, provided with slot m and screw m, in combination with 'the clamp r and screws M r, as and for the purpose set forth.

3. The post (1, provided with the slot It and arm (1 in combination with the set-screws k and c, and the rotating shaft 12, substantially as described.

' 4. The grindstone i, in combination with the rotating and sliding shaft 6, as and for the purpose described.

5. The adjustable bed-piece B, in combination with the clamp 1*, post d, grindstone 2', and rotating and slidingshaft 12, as and for the purpose specified.

W. H., LAUBAOH. Witnesses I Jno. H. WARDER Ros'r. BUnnnrr. 

